:root{--accent:#0b3d6b;--signal:#0a7186;--bg:#f4f6f9;--ink:#101418;--muted:#525d68;--rule:#d5dce4;
  --card:#fff;--tint:#e9eff6;--measure:780px;
  --sans:"IBM Plex Sans","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16.5px/1.62 var(--sans)}
a{color:var(--accent);text-underline-offset:2px}
a:hover{color:var(--signal)}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.skip{position:absolute;left:-999px;top:6px;z-index:9;background:var(--accent);color:#fff;padding:8px 14px}
.skip:focus{left:6px}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
img{max-width:100%;height:auto}

header.site{background:var(--card);border-bottom:1px solid var(--rule)}
.split{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px 24px;
  padding-top:16px;padding-bottom:16px}
.id{display:flex;align-items:center;gap:12px}
.id .mark{display:block;width:34px;height:34px}
.id .brand{font-weight:700;font-size:1.16rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.id .tag{margin:2px 0 0;font-size:.8rem;color:var(--muted)}
nav.site{display:flex;flex-wrap:wrap;background:var(--tint);border-radius:8px;padding:3px}
nav.site a{color:var(--muted);text-decoration:none;font-size:.85rem;font-weight:500;padding:6px 13px;border-radius:6px}
nav.site a:hover{color:var(--ink)}
nav.site a[aria-current]{background:var(--card);color:var(--accent);font-weight:600;
  box-shadow:0 1px 2px rgba(16,20,24,.12)}

main.wrap{padding-bottom:20px}
main.wrap>*{max-width:var(--measure)}
main.wrap>.hero,main.wrap>.cathead,main.wrap>.latest,main.wrap>.tablewrap{max-width:none}
h1{font-size:clamp(1.8rem,4vw,2.4rem);line-height:1.15;font-weight:700;letter-spacing:-.02em;margin:10px 0 18px}
h2{font-size:1.32rem;line-height:1.3;font-weight:700;margin:42px 0 10px}
h3{font-size:1.06rem;font-weight:700;margin:26px 0 6px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;margin:26px 0 0;padding:0;
  font:.78rem/1.4 var(--mono);color:var(--muted)}
.crumbs li+li::before{content:"/";margin:0 6px 0 2px;color:#a9b4bf}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent);text-decoration:underline}
.crumbs [aria-current]{max-width:38ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.answer{background:var(--card);border:1px solid var(--rule);border-top:4px solid var(--accent);border-radius:6px;
  padding:16px 20px 18px;margin:20px 0 18px;box-shadow:0 1px 3px rgba(16,20,24,.06)}
.answer .label{display:flex;align-items:center;gap:8px;margin:0 0 8px;font:600 .72rem/1 var(--mono);
  letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.answer .label::before{content:"";width:8px;height:8px;background:var(--signal)}
.answer p{margin:0;font-size:1.04rem}
.meta{margin:0 0 6px;font-size:.82rem;color:var(--muted)}
.meta a{color:var(--ink);font-weight:600}
.meta .upd{color:var(--signal);font-weight:600}

.body h2{padding-bottom:6px;border-bottom:1px solid var(--rule)}
.body ul,.body ol{padding-left:22px}
.body li{margin:5px 0}
.body blockquote{margin:22px 0;padding:12px 16px;background:var(--tint);border-radius:6px;color:#2a333c}
figure{margin:28px 0}
figure img{display:block;border-radius:6px;border:1px solid var(--rule)}

.tablewrap{overflow-x:auto;margin:24px 0;background:var(--card);border:1px solid var(--rule);border-radius:8px;
  box-shadow:0 1px 3px rgba(16,20,24,.05)}
table{width:100%;border-collapse:collapse;font-size:.86rem;line-height:1.4;font-variant-numeric:tabular-nums}
caption{caption-side:top;text-align:left;padding:12px 14px 6px;font:600 .72rem/1 var(--mono);letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted)}
th,td{padding:9px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--rule)}
thead th{background:var(--tint);color:var(--accent);font-size:.76rem;font-weight:600;letter-spacing:.03em;
  border-bottom:1px solid #c3cdd8;white-space:nowrap}
tbody tr:nth-child(even){background:#fafbfd}
tbody tr:hover{background:#eef4fa}
tbody tr:last-child>*{border-bottom:0}
.num{text-align:right;font-family:var(--mono);font-size:.8rem;white-space:nowrap}

.methodnote{display:block;margin:30px 0;padding:14px 18px;background:var(--tint);border-left:3px solid var(--signal);
  border-radius:0 6px 6px 0;font-size:.88rem}
.methodnote strong{color:var(--accent)}
.related,.authorcard,.disclosure,.faq{margin:32px 0}
.related .label{margin:0 0 10px;font:600 .72rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted)}
.related ul{list-style:none;margin:0;padding:0;display:grid;gap:8px;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.related li a{display:block;height:100%;padding:12px 14px;background:var(--card);border:1px solid var(--rule);
  border-radius:6px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.92rem;line-height:1.35}
.related li a:hover{border-color:var(--accent);color:var(--accent)}
.authorcard{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--rule);
  border-radius:8px;padding:16px 18px}
.avatar{flex:none;display:grid;place-items:center;width:46px;height:46px;border-radius:8px;background:var(--accent);
  color:#fff;font:600 .92rem/1 var(--mono)}
.authorcard p{margin:0 0 4px;font-size:.9rem}
.authorcard .who{font-weight:700;font-size:.98rem}
.authorcard .role{font:.76rem var(--mono);color:var(--signal);text-transform:uppercase;letter-spacing:.06em}
.disclosure{font-size:.8rem;color:var(--muted)}

.hero,.cathead{padding:40px 0 8px}
.hero h1,.cathead h1{max-width:26ch;margin:0 0 12px}
.lede{max-width:68ch;color:var(--muted);margin:0}
.howbox{margin:26px 0 8px;padding:18px 22px;background:var(--card);border:1px solid var(--rule);
  border-left:4px solid var(--signal);border-radius:0 8px 8px 0}
.howbox .sect{margin:0 0 6px;font-size:1rem}
.howbox p{margin:0 0 6px;font-size:.93rem}
.sect{font-size:1.1rem;margin:36px 0 12px}
.latest .info{font:.78rem var(--mono);color:var(--muted)}
.ledger tbody th{font-weight:600;min-width:260px}
.ledger tbody th a{color:var(--ink);text-decoration:none}
.ledger tbody th a:hover{color:var(--accent);text-decoration:underline}
.ledger td{color:var(--muted);white-space:nowrap}

.bylist{list-style:none;padding:0}
.bylist li{padding:11px 0;border-bottom:1px solid var(--rule)}
.bylist a{font-weight:600}
.bylist .when{font:.76rem var(--mono);color:var(--muted);margin-left:6px}
.bylist .ans{font-size:.9rem;color:#3a434c}
.people li{margin:8px 0}

footer.site{margin-top:64px;background:var(--card);border-top:1px solid var(--rule);padding:34px 0 26px;
  font-size:.86rem;color:var(--muted)}
footer.site .grid{display:grid;gap:22px 40px;grid-template-columns:2fr 1fr 1fr}
footer.site .grid p{margin:0}
footer.site .fh{margin:0 0 8px;font:600 .72rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink)}
footer.site .grid>div .fh{font:700 1rem/1.2 var(--sans);letter-spacing:0;text-transform:none}
footer.site nav a{display:block;padding:3px 0;color:var(--muted);text-decoration:none}
footer.site nav a:hover{color:var(--accent);text-decoration:underline}
footer.site .fine{margin-top:26px;padding-top:14px;border-top:1px solid var(--rule);font-size:.76rem}
@media(max-width:700px){footer.site .grid{grid-template-columns:1fr 1fr}
  footer.site .grid>div{grid-column:1/-1}}